(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

This guide provides a more detailed description of the syntax that is supported along with examples.

This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.

Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

A device for controlling the combustion process in an internal combustion engine

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention relates to an internal combustion engine of the type where a fuel-air mixture is self-ignited by the compression heat, such as HCCI-engines
The active control of the compression ratio and thereby the ignition time for such an engine has already been proposed by using an extra piston in the engine cylinder head.
The solution now presented includes an extra piston used for that purpose, but the extra piston is also used as a valve for of one of the inlet or outlet ports of the combustion chamber. Two pistons may be used, one as the inlet valve and one as the exhaust valve.
The extra piston(s) will not limit the combustion chamber surface, which is necessary for a good gas exchange in the combustion chamber.

Country

Undisclosed

Language

English (United States)

This text was extracted from a Microsoft Word document.

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
52% of the total text.

A device for controlling the
combustion process in an internal combustion engine

The invention
relates to an internal combustion engine of the type where a fuel-air mixture
is self-ignited by the compression heat. Such internal combustion engines are
usually called HCCI-engines (Homogeneous Charge Compression Ignition). The
active control of the compression ratio and thereby the ignition time for such
an engine has already been proposed by using an extra piston in the engine
cylinder head. However, a drawback in using such a solution is the very limited
surface area that is left for making a sufficient exchange of gases in the
combustion chamber possible. The extra piston has to protrude into the
combustion chamber and the bigger its surface area is, the less it has to
protrude into the combustion chamber, which is important in order to be able to
keep the ordinary piston stroke.

The problem to
be solved is to use an extra piston in a way that will not limit the combustion
chamber surface, which is necessary for a good gas exchange in the combustion
chamber. This is solved by building together an extra piston and a valve of one
of the inlet or outlet ports of the combustion chamber.

Fig. 1 shows a
cylinder 1 of such an engine, according to an embodiment of the invention. The
cylinder 1 comprises a combustion chamber 2, which downwards is restricted by a
piston 3. An inlet valve, in the form of a first integrated piston valve 4, is
arranged to control the supply of the fuel-air mixture fed into the combustion
chamber 2 via an inlet port 5. An exhaust valve, in the form of a second
integrat...